Instruction manual

21073 21074 31036

AM 60 AZ AM 70AZ AM 76 AZ

Optical Design Refractor Refractor Newtonian

Aperture 60mm (2.4”) 70mm (2.7”) 76mm (3.0”)

Focal Length 700mm 700mm 700mm

Focal Ratio f/12 f/10 f/9

Secondary Mirror Obstruction -- Dia. - Area n/a n/a 31mm - 10%

Optical Coatings Fully coated Fully coated Fully coated

Finderscope Star Pointer Star Pointer Star Pointer

Diagonal 1.25”Mirror 1.25”Mirror n/a

Eyepieces 1.25”

Apparent FOV -- 25 mm @ 50° 20 mm (35x) 20 mm (35x) 20 mm (35x)

-- 10 mm @ 40° 10 mm (70x) 10 mm(70x) 10 mm (70x)

Angular Field of View w/standard eyepiece 1.7° 1.7° 1.7°

Linear FOV w/standard eyepiece -ft/1000yds 89’ 89’ 89’

Mount Altazimuth Altazimuth Altazimuth

Pan Handle Control for Altitude yes yes yes

Azimuth Lock yes yes yes

Tripod Leg Diameter 1.00” yes yes yes

CD-ROM “The Sky” Level 1 yes yes yes

Highest Useful Magniﬁcation 144x 162x 180x

Limiting Stellar Magnitude 11.4 11.7 11.9

Resolution -- Raleigh (arc seconds) 2.32 1.99 1.83

Resolution -- Dawes Limit “ “ 1.93 1.66 1.53

Light Gathering Power 73x 100x 118x

Optical Tube Length 28” (71cm) 28” (71cm) 26” (66cm)

Telescope Weight 13 # (5.8kg) 16 # (7.2kg) 12 # (5.4kg)

Note: Speciﬁcations are subject to change without notice or obligation

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part

15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a resi-

dential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and

used in accordance with the instructions, may cause harmful interference to radio communications. However, there is

no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interfer-

ence to radio or television reception, which can be determined by turning the equipment off and on, the user is encour-

aged to try to correct the interference by one or more of the following measures:

—Reorient or relocate the receiving antenna.

—Increase the separation between the equipment and receiver.

—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

—Consult the dealer or an experienced radio/TV technician for help.

ASTROMASTER LT SPECIFICATIONS